POWER AMPLIFIER CONTROL CIRCUITS

摘要

Circuits for reducing power consumption in power amplifier circuits are disclosed. In certain embodiments, a circuit for power control in the transmitter includes a coupling circuit, a first power amplifier circuit and a second power amplifier circuit. The coupling circuit includes a primary winding inductively associated with a first secondary winding and a second secondary winding. The coupling circuit provides a signal at output terminals of the first secondary winding and the second secondary winding in response to a signal at the primary winding. A first power amplifier circuit is coupled with output terminals of the first secondary winding, and a second power amplifier is coupled with output terminals of the second secondary winding. The first power amplifier circuit and second power amplifier circuit are configured to be enabled or disabled based on a bias voltage.

主权项

1. A circuit for power control of power amplifier circuits, the circuit comprising:
a coupling circuit comprising a primary winding, a first secondary winding and a second secondary winding, the first secondary winding and the second secondary winding inductively associated with the primary winding, the coupling circuit configured to provide a signal at output terminals of the first secondary winding and output terminals of the second secondary winding, in response to an input signal received at the primary winding; a first power amplifier circuit coupled with the output terminals of the first secondary winding, wherein the first power amplifier circuit is configured to be enabled and disabled based on a first bias voltage selectively applied at the first secondary winding; and a second power amplifier circuit coupled with the output terminals of the second secondary winding, wherein the second power amplifier circuit is configured to be enabled and disabled based on a second bias voltage selectively applied at the second secondary winding.